Got an 03 Suburban with no xm but with bose speakers. No aux is one of the first things I'll change. Been reading on adding etc but it seems that to add one without tapping xm is going to run about $100. I'm trying to see who is running what HU that also controls Spotify and or maps. I'm using an iPhone 7 so Bluetooth it is. I use my phone for gps so that's no important at all in the unit. Post some pics and let's talk about it. I know nearly nothing about what's out there in the aftermarket either so I'll be learning as I go. I know there is a wealth of knowledge on this board so thanks in advance to all!